Grade Technology

All Grant Prideco products are manufactured using specially engineered materials. Grant Prideco uses special proprietary chemistries and controlled processing. The result is a material with increased hardenability and toughness, more homogeneous microstructures, and consistent metallurgical and mechanical properties throughout the cross section. These enhancements result in a more reliable weld. Grant Prideco engineered materials provide increased product performance and integrity.

Grant Prideco tool joints are oil quenched and tempered to obtain the required mechanical properties. Modern heat-treating equipment, careful process control, and thorough inspections ensure consistent quality. Hardness is verified on every tool joint by a Brinell hardness test. Tensile and impact properties are verified by destructive testing of one pin and one box per batch. Every tool joint receives a wet magnetic particle inspection to confirm the absence of defects.

The increased hardenability of Grant Prideco 's proprietary SN2039 tool joint material provides more consistent mechanical properties through the tool joint sections, such as the critical section at the last engaged thread, especially onrecut joints.

Grant Prideco purchases green tubes only from high-quality mill sources. These tubes are produced to our proprietary Specification 301. This unique steel provides excellent hardenability and toughness and can be heat-treated to produce any API grade. Stringent steel cleanliness requirements result in enhanced fracture toughness. Upon arrival, an incoming inspection verifies that all material requirements are met.

After the ends have been upset, Grant Prideco tubes receive a full-length quenched and tempered heat treatment. Modern austenitizing and tempering furnaces are used. The tubes are externally water-quenched, and tensile and impact properties are verified by destructive tests.

TSS-95™ Tough Sour Service 95 Grade Drill Pipe

TSS-95 is a proprietary drill pipe grade offered by Grant Prideco for service in 2 environments. TSS-95 features a unique chemical formula and a special quenched and tempered heat treatment. The result is a steel that has optimum fracture toughness, controlled yield strength, and restricted hardness. With an NACE threshold of 85% of the yield strength, TSS-95 is resistant to sulfide stress-cracking. TSS-95 also offers optimum resistance to crack initiation and crack propagation. Its fracture toughness makes TSS-95 ideal for the more demanding drilling applications, such as those with high bending loads and corrosive environments.

With aNACE threshold of 85% of the yield strength, TSS-™provides optimum fracture toughness, controlled yield strength, and restricted hardness for service in H2S environments.

S-135™ Enhanced Toughness 135 Grade Drill Pipe

S-135T is a proprietary drill pipe grade offered by Grant Prideco for applications that require high strength and high toughness. S-135T incorporates a proprietary chemistry and a rigidly controlled quenched and tempered heat-treatment process. The minimum average specified Charpy impact energy is 59ft-lb, a 47% increase in impact energy over standard API S-135 grade. The performance behavior resulting from this increase in toughness provides a margin of safety superior to normal high-strength materials.

The processed drill pipe tubes undergo an intensive inspection process, which includes a magnetic particle end area inspection and a full-length inspection for longitudinal and transverse defects and wall thickness verification.